ghsa-6h98-v544-xj7q
Vulnerability from github
Published
2024-05-21 15:31
Modified
2024-12-30 21:30
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

net: qrtr: fix OOB Read in qrtr_endpoint_post

Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong size type:

if (len != ALIGN(size, 4) + hdrlen)
    goto err;

If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and

skb_put_data(skb, data + hdrlen, size);

will read out of bound from data, which is hdrlen allocated block.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47240"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:13Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix OOB Read in qrtr_endpoint_post\n\nSyzbot reported slab-out-of-bounds Read in\nqrtr_endpoint_post. The problem was in wrong\n_size_ type:\n\n\tif (len != ALIGN(size, 4) + hdrlen)\n\t\tgoto err;\n\nIf size from qrtr_hdr is 4294967293 (0xfffffffd), the result of\nALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293\nin header this check won\u0027t fail and\n\n\tskb_put_data(skb, data + hdrlen, size);\n\nwill read out of bound from data, which is hdrlen allocated block.",
  "id": "GHSA-6h98-v544-xj7q",
  "modified": "2024-12-30T21:30:46Z",
  "published": "2024-05-21T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26b8d10703a9be45d6097946b2b4011f7dd2c56f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/960b08dd36de1e341e3eb43d1c547513e338f4f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad9d24c9429e2159d1e279dc3a83191ccb4daf1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8111c0d7ed42ede41a3d0d393b104de0730a8a6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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